﻿//
// (C) Copyright 2009 Irantha Suwandarathna (irantha@gmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use _in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions _in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer _in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EffiProz.Core.Errors;

namespace EffiProz.Core.DataTypes
{



    using System;
    using System.Runtime.Serialization;
    using EffiProz.Core.Lib;


    /**
     * Represents of an instance of an OTHER field value. <p>
     *
     * Prior to 1.7.0 there were problems storing Objects of normal column types
     * _in columns of the type OTHER. In 1.7.0 changes were made to allow this,
     * but as all the conversion took place inside the engine, it introduced a
     * requirement for all classes for objects stored _in OTHER columns to be
     * available on the runtime class path of the engine. <p>
     *
     * In 1.7.2, the introduction of real preprared statement support allows us
     * revert to the pre 1.7.0 behaviour without the artificial limitations. <p>
     *
     * The classes for stored objects need not be available to open and operate
     * the database _in general. The classes need to be available only if a
     * conversion from one of these objects to another type is performed inside
     * the engine while operating the database.
     *
     * The current limitation is that _in SQL statements, values of type String
     * (CHARACTER and related SQL types) cannot be stored _in columns of type
     * OTHER. This limitation does not exist for string values assigned to
     * PreparedStatement variables.
     *
     * @author fredt@users
     * @version 1.7.2
     * @since 1.7.2
     */
    public class OtherData
    {

        private byte[] data;

        /**
         * Constructor used inside the engine when an already serialized
         * Object is read from a file (.log, .script, .data or text table source).
         */
        public OtherData(byte[] data)
        {
            this.data = data;
        }

        /**
         * Constructor used inside the engine to convert an Object into an
         * object of type OTHER.
         * Used also with JDBC setParameter().
         * If parameter serialize is true, the Object is serialized for storage.
         */
        public OtherData(Object o)
        {
#if !SILVERLIGHT
            try
            {
                data = InOutUtil.serialize(o);
            }
            catch (Exception e)
            {
                throw Error.error(ErrorCode.X_22521, e.ToString());
            }
#else
            throw new NotSupportedException();
#endif

        }

        public byte[] getBytes()
        {
            return data;
        }

        public int getBytesLength()
        {
            return data.Length;
        }

        /**
         * This method is called from classes implementing the JDBC
         * interfaces. Inside the engine it is used for conversion from a value of
         * type OTHER to another type. It will throw if the OTHER is an instance
         * of a classe that is not available.
         */
        public Object getObject()
        {
#if !SILVERLIGHT
            try
            {
                return InOutUtil.deserialize(data);
            }
            catch (Exception e)
            {
                throw Error.error(ErrorCode.X_22521, e.ToString());
            }
#else
            return null;
#endif
        }

        /**
         * Returns string repsentation of this object.
         *
         * @return a string represntation of this object.
         */
        public override string ToString()
        {
            return base.ToString();
        }
    }

}
